untreated

adjective un·treat·ed \ ˌən-ˈtrē-təd \

Updated on: 18 May 2018

Definition of untreated

: not treated

untreated wastewater

; especially : not improved or controlled medically

an untreated case of pneumonia

untreated diabetic patients

See untreated defined for English-language learners

Recent Examples of untreated from the Web

If left untreated, chlamydia and gonorrhea can cause pelvic inflammatory disease and lead to infertility, ectopic pregnancy and chronic pelvic pain.

— peter fimrite, San Francisco Chronicle, "Sexually transmitted diseases dramatically increase in California," 14 May 2018
Left untreated for a year or more, their chances of being symptom free are drastically reduced.

— shaili jain, STAT, "Preventing PTSD: calling Dr. Tetris?," 14 May 2018
If left untreated, Lyme disease can cause arthritis, heart palpitations and shooting pains.

— lyndsey matthews, Country Living, "People Are Freaking Out After CDC Posts Photo of Ticks on a Poppy Seed Muffin," 10 May 2018
Lyme disease can affect a person’s nervous system if left untreated, leading to body rashes, tingling of hands and feet, and heart palpitations, according to the CDC. 2.

— elyssa cherney, chicagotribune.com, "Bug-bite diseases are on the rise nationwide: What to watch out for in Illinois," 4 May 2018
If left untreated, pre-diabetes increases the risk of type 2 diabetes, heart disease, stroke and death.

— naseem s. miller, OrlandoSentinel.com, "Orlando free clinic Grace Medical Home part of pre-diabetes study," 13 Apr. 2018
That untreated river water leached lead from pipes into Flint's drinking supply, and later tests showed high lead levels in some local schoolchildren.

— NBC News, "Lead crisis: Flint braces as Michigan shuts down free bottled water sites," 9 Apr. 2018
If left untreated, late-stage syphilis can cause irreversible neurological damage.

— matthew ormseth, courant.com, "Hartford Secures Grant To Combat Syphilis, On The Rebound In Connecticut And The Country," 6 Apr. 2018
If left untreated, gonorrhea can lead to pelvic inflammatory disease, ectopic pregnancy, stillbirths, severe eye infections in babies and infertility in both men and women.

— Fox News, "Untreatable 'super gonorrhea' case could be 'tip of the iceberg'," 2 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'untreated.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of untreated

15th century

in the meaning defined above

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untreated Synonyms

Phrases

in the raw, in the rough;

Medical Dictionary

untreated

adjective un·treat·ed \ -ˈtrēt-əd \

medical Definition of untreated

: not subjected to treatment

an untreated disease

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